Automatic cut-off for tanks.



W. P. MORRIS.

AUTOMATIC GUT-OFF FOR TANKS.

APPLIGATION FILED 1130.9, 1910.

315m, 595, Patented Feb. 6, 1912.

IN'vENTIJR UNITED STATES PATENT oEEioE.l

WILLIAM P. NORIS, OF SISTERSVILLE, WESI VIRGINIA A'UToMA'rIc our-OFF roza TANKS.

Specification of Letters Patent.

APatented Een; 6, 1912.

Application led December 9, `1910. Serial No.- 596,514.

automatic cut-offs for oil and other tanks,-

and it consists in the particular construc-4 tion, arrangement and combination of parts which will hereinafter be fully described.

The primary object of the invention is to provide means whereby the supply of fluid entering or passing froma tank may be automatically cut off at any predetermined level.v

' A urth'erobject is to provide a simple, efficient andi" inexpensive device for automaticatlly closing the tank against egress of fluid when a predetermined level is reached, and means whereby said tank is automatically clo'sed to prevent overiow when iilled.

The invention has relationto that class of automatic cut-offs disclosed by United States Letters Patent, No. 882,956, granted to me March 24, 1908, and it contemplates the structural improvement of the mechanism disclosed by said patent.

In describin the invention in detail, reference'i's hereinVv had to the accompanying drawings forminga part of this specification, in which Figure 1 is a side elevation of the invention applied to a tank, the latter being shown in vertical section; Fig. 2 is an enlarged vertical section of the invention, a broken portion of the top of `a tank being shown; and-Fig. 3 is an enlarged section on the line 354%, F ig. 1.

Referring to said drawings, in which like designating characters distinguish like parts throughout the several views-1 indicates a tank through the wall of which extends a service pipe 2 through which the tank is both filled and emptied. Mounted upon the inner end of said pipe is the tubular nipple 3 of a valve casing 4. Said casing is provided With a valve seat 5 upon which a ver tically movable gate-valve 6 is adapted to seat for closing a port 7 leading from the interior of said casing to said pipe. Said valve seat referably has an inclined'wall 5a on. the si e4 opposite the port`7,l and the valve 6 has a correspondingly located and correspondingly inclined face 6a as shown,

said wall and said face cooperating to seat said valve in a position effectually closing the port 7.

The valve 6 is fixed upon the lower end of a vertically-movable rod 8 which' extends outward through the top 9 of the tank and bears a weight 10 upon its upper end. collar 11T adjustably mounted upon the rod 8is1normally engaged on its under face by the point 12a ofva lever 12 which is pivotally supported intermediate its ends upon a standard 13 mounted upon the top of the tank, said lever normally maintaining the rod "8 and attached valve 6 in an upraised position, as shown in Fig. 2. Adjustably supported in the end of said lever,12 which is opposite its point 12L is a removable sleeve 14, preferably rectangular in form, in which is adjustably mounted a verticallymovable rod 15, a set-screw 16 being provided for holding said rod in adjusted position. The rod 15 has a lfixed head 26 upon its lower end, and freely movable or slidable upon the body of said rod isa hollow float 17 comprising a cylindrical vessel having a central rod-embracing tube 18, the opposite ends of which project. beyond the ends of said vessel. An apertured tubular inlet 19 is provided upon the top of the ioat for a purpose which will presently be explained...

In practice, when it is desired to fill the tank, a collar 20 is adjusted upon the float 15 according to the depth of iuid which it is desired attained in the tank, and the valve 5 is opened. Vhen the float has risen with the rising fluid until the upper end of the tube 18 engages said collar 20, the latter begins to rise therewithV carrying the'rod 15 upward and elevating the butt-end of the lever 12 until its poi t 12a becomes dis- 1 engaged from collarl 11, gate-valve 5 are permitted to drop, the lat? ter assuming its seat and closing the port 7.

In removing the Huid from the tank, when said fluid is lowered sufficiently, the -lower hen the rod 8 and end of the tube 18 seatsupon the head 16 for automatically cutting-olf the discharge 1F10 of fluid at any predetermined'levelf I When the valve isfopenl to the admission offfluidy and the device has not'been adjusted to close the port at any predeter- .mined point, the tank is nevertheless prevented from overilowing in the following manner: LThe float is raised until it reaches a non-progressive positionagainst the top ofthe tank. Iii? this position it will be lled With fluid through the tubular inlet 19 as the Huid in the tank rises about it. yThe Weight of the flo t will consequently become such that it wil sink upon the head of the rod,15, carrying the latter downward, and, through the intermediate mechanism, effecting the closing of port 7.

y A suitable strainer 21 is provided where` by foreign substances or matter is prevented from entering the tank With the Huid. Said strainer is carried upon the lower end of "casin in said casing, a valve, a rod from which ters Patent, s-

a tube 22 through which the valve rod 8 is extended, and it seats in the upper end of the valve casing 4. When it is desired to remove the strainer for any purpose, as

for cleaning, a guide-plate 23 is removed from its supports, and said tube 22 and attached strainer are raised bodily through a lid-closed opening 24 provided in the top of the tank. A lid-closed opening 25 is also l provided in the top of the tank for permitting ofthe removal of the float from the tank.

" Having thus described my invention, what I'claim as new, and desire to secure by Letf The combination with a tank having a service-pipe extended thereinto, of a valveconnectedl to said pipe, a valve-seat said 4valve is suspended, a lever pivotally service-pipe extended thereinto, of a valvecasing A 1n said caslng, a valve, a rod from which said valve 1s suspended, a lever point of said lever, a float-rod adjustably mounted upon the opposite end of said lever and extending into the tank, a hollow float slidable on said float-rod within the tank,v and removable means fdr preventing forei matter from entering the. tank with t e fluid, said means comprising a strainer seated within the `top of said valve-casing, and a tube to which said strainer is connected, said tube extending to the top of the tank.

In testimony whereof -I atiix my signa ture in presence of'two subscriblng witnesses.

WILLIAM P. NORRIS.

Witnesses:

' W. S. KING,

A. R. WLKER.

connected to said pipe, a valve-seat ivotally mounted oversaid tank, adjustab e` `mea.ns vwhereby said rod is suspended from the 

